Sealing injection molding cover plate of power battery

Abstract

The utility model discloses a sealing injection molding cover plate for a power battery, which relates to the technical field of power batteries and comprises a support frame, a base plate is fixedly arranged at the upper end of the support frame, two notches are arranged on the base plate, a negative pole is fixedly mounted at one notch, a positive pole is fixedly mounted at the other notch, and the negative pole and the positive pole are fixedly connected with the support frame. The periphery, located above the substrate, of the positive pole of the negative pole is coated with upper plastic, and a welding ring is embedded between the upper plastic and the supporting frame; the welding ring and the pole are firstly subjected to injection molding and then are assembled and welded with the substrate, so that extrusion of injection molding on the sealing gasket is avoided, and the sealing performance of the cover plate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely relates to a power battery sealed injection molding cover plate. BACKGROUND

[0002] In the field of electronic device and battery manufacturing, injection molding cover plate structure as a key packaging component is widely used in the packaging process of various battery packs, electronic modules and other products. The traditional injection molding cover plate structure is usually composed of injection molding material, sealing gasket, pole and aluminum sheet. In the manufacturing process, the injection molding material is injected into the mold and solidified to form a shell with certain strength and shape. However, the traditional injection molding process has obvious defects, especially in the injection molding process, because the injection molding material is injected into the mold under high pressure, which will generate a large extrusion force on the sealing gasket located inside the mold.

[0003] As a key component to ensure the air tightness of the cover plate, the structure and position of the sealing gasket are usually very precise. However, under the action of high pressure injection molding, the sealing gasket is prone to deformation or displacement, which affects the sealing between the cover plate and the pole, and further causes the problem of poor air tightness. This not only affects the performance and service life of the product, but also may cause safety hazards such as battery leakage, gas leakage, etc.

[0004] In order to overcome the defects of the traditional injection molding cover plate structure, the industry has been exploring new manufacturing processes and structure designs. However, the existing improvement schemes mostly focus on the optimization of sealing gasket material and the adjustment of mold structure, which improves the air tightness to some extent, but does not fundamentally solve the problem of extrusion deformation of sealing gasket in the injection molding process. INVENTION CONTENTS

[0005] The purpose of the utility model is to provide a power battery sealed injection molding cover plate, which solves the problem of poor air tightness in the traditional injection molding cover plate structure.

[0006] The purpose of the utility model can be realized by the following technical scheme:

[0007] A power battery sealed injection molding cover plate, comprising a support frame, a base plate is fixedly arranged at the upper end of the support frame, two notches are arranged on the base plate, a negative pole is fixedly installed at one of the notches, and a positive pole is fixedly installed at the other notch, the outer periphery of the positive pole above the base plate is covered with an upper plastic, and a welding ring is embedded between the upper plastic and the support frame.

[0008] Preferably, the axial section of the welding ring is Z-shaped, one end of which is embedded in the upper plastic, and the other end is fixedly connected to the support frame.

[0009] Preferably, the lower end of the support frame is fixedly provided with a plurality of support bosses, and the support bosses are provided with a plurality of mounting holes.

[0010] Preferably, an explosion-proof groove is provided in the middle of the support frame, and an explosion-proof valve is fixedly installed in the explosion-proof groove.

[0011] Preferably, the bottom of the explosion-proof groove is provided with several evenly distributed heat dissipation grooves.

[0012] Preferably, an explosion-proof patch for protecting the explosion-proof valve is attached to the upper end of the substrate.

[0013] Preferably, the support frame is fixedly mounted with conductive electrode posts that cooperate with the negative electrode post and the positive electrode post.

[0014] Preferably, a sealing gasket is fixedly provided between the conductive electrode post and the support frame.

[0015] Preferably, the upper end of the support frame is fixedly provided with a plurality of positioning posts, and the lower end of the base plate is provided with positioning holes that cooperate with the positioning posts.

[0016] Preferably, the substrate is provided with a positioning protrusion, the positioning protrusion is provided with a bolt hole, and the support frame is provided with a mounting seat that cooperates with the positioning protrusion.

[0017] The beneficial effects of this utility model are:

[0018] (1) In this utility model, the welding ring and the pole are first injection molded and then assembled and welded to the substrate to avoid the injection molding squeezing the sealing gasket and improve the sealing performance of the cover plate.

[0019] (2) The Z-shaped welding ring can ensure the stability of the connection between the welding ring and the support frame and the upper plastic, thereby improving the overall strength and sealing performance of the entire injection molded cover plate. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a power battery sealing injection molded cover plate according to the present invention;

[0022] Figure 2 This is an isometric structural diagram of a power battery sealing injection molded cover plate according to the present invention;

[0023] Figure 3 This is a top view schematic diagram of a power battery sealing injection molded cover plate according to the present invention;

[0024] Figure 4 This is a utility model Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;

[0025] Figure 5 This is a structural schematic diagram of the support frame of this utility model.

[0026] In the diagram: 1. Substrate; 101. Bolt hole; 102. Positioning protrusion; 2. Negative electrode post; 3. Positive electrode post; 4. Top plastic; 5. Support frame; 51. Support boss; 52. Mounting hole; 53. Explosion-proof groove; 54. Mounting base; 55. Positioning post; 6. Conductive electrode post; 7. Sealing gasket; 8. Welding ring; 9. Explosion-proof valve; 10. Explosion-proof patch. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention / utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention / utility model, and not all embodiments. Based on the embodiments of the present invention / utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention / utility model.

[0028] In the description of this invention / utility model, it should be understood that the terms "upper," "lower," "left," "right," etc., indicating orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0029] In the description of this invention / utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Please see Figures 1-5As shown, this utility model is a power battery sealing injection molded cover plate, including a support frame 5. A base plate 1 is fixedly installed on the upper end of the support frame 5. The base plate 1 is provided with two slots. A negative terminal post 2 is fixedly installed in one slot and a positive terminal post 3 is fixedly installed in the other slot. The outer periphery of the positive terminal post 3 above the base plate 1 is covered with an upper plastic 4. A welding ring 8 is embedded between the upper plastic 4 and the support frame 5.

[0031] In an optional embodiment, the axial section of the welding ring 8 is Z-shaped, with one end embedded in the upper plastic 4 and the other end fixedly connected to the support frame 5.

[0032] It should be noted that the Z-shaped welding ring 8 can ensure the stability of the connection between the welding ring, the support frame 5, and the upper plastic 4, thereby improving the overall strength and sealing performance of the entire injection molded cover plate.

[0033] In an optional embodiment, the lower end of the support frame 5 is fixedly provided with a plurality of support bosses 51, and the support bosses 51 are provided with a plurality of mounting holes 52.

[0034] It should be noted that the mounting hole 52 ensures the overall stability of the injection molded cover plate, and the support boss 51 allows the pole post to be suspended in mid-air.

[0035] In an optional embodiment, an explosion-proof groove 53 is provided in the middle of the support frame 5, and an explosion-proof valve 9 is fixedly installed in the explosion-proof groove 53.

[0036] In an optional embodiment, the bottom of the explosion-proof groove 53 is provided with a plurality of evenly distributed heat dissipation grooves.

[0037] It should be noted that the heat dissipation channel ensures the heat dissipation performance of the explosion-proof valve 9.

[0038] In an optional embodiment, an explosion-proof patch 10 for protecting the explosion-proof valve 9 is attached to the upper end of the substrate 1.

[0039] It should be noted that the explosion-proof patch 10 provides protection for the explosion-proof valve 9.

[0040] In an optional embodiment, a conductive electrode post 6 that cooperates with the negative electrode post 2 and the positive electrode post 3 is fixedly installed on the support frame 5.

[0041] It should be noted that the placement of the conductive electrode post 6 ensures the stability of the conductive connection between the negative electrode post 2 and the positive electrode post 3.

[0042] In an optional embodiment, a sealing gasket 7 is fixedly disposed between the conductive electrode post 6 and the support frame 5.

[0043] It should be noted that the sealing gasket 7 improves the stability and sealing of the conductive electrode post 6 during installation.

[0044] In an optional embodiment, a plurality of positioning posts 55 are fixedly provided at the upper end of the support frame 5, and a positioning hole that cooperates with the positioning posts 55 is provided at the lower end of the base plate 1.

[0045] It should be noted that the positioning holes and the corresponding positioning pins 55 are used to ensure the accuracy of the fit between the support frame 5 and the base plate 1.

[0046] In an optional embodiment, the substrate 1 is provided with a positioning protrusion 102, the positioning protrusion 102 is provided with a bolt hole 101, and the support frame 5 is provided with a mounting base 54 that cooperates with the positioning protrusion 102.

[0047] It should be noted that the mounting base 54 and the positioning protrusion 102 are fitted together and fixed with screws to ensure the airtightness of the support frame 5 and the base plate 1.

[0048] The working principle of this utility model is as follows: It changes the traditional injection molding overmolding structure by adding a welding ring 8, so the injection molding only serves as the external overmolding. This avoids problems such as poor battery airtightness and leakage caused by the compression of the sealing gasket due to loosening of the injection molding overmolding. It also improves the overall strength of the cover plate. By first injection molding the welding ring 8 to the terminal post and then assembling and welding it to the substrate 1, it avoids the injection molding compressing the sealing gasket 7, thus improving the cover plate's sealing performance.

[0049] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A sealing injection-molded cover for a power battery, characterized in that, The system includes a support frame (5), on which a base plate (1) is fixedly mounted. The base plate (1) has two slots, one of which is fixedly mounted with a negative electrode post (2) and the other slot is fixedly mounted with a positive electrode post (3). The outer periphery of the positive electrode post (3) of the negative electrode post (2) above the base plate (1) is covered with an upper plastic (4). A welding ring (8) is embedded between the upper plastic (4) and the support frame (5).

2. The power battery sealing injection molded cover plate according to claim 1, characterized in that, The axial section of the welding ring (8) is Z-shaped, with one end embedded in the upper plastic (4) and the other end fixedly connected to the support frame (5).

3. The power battery sealing injection molded cover plate according to claim 1, characterized in that, The lower end of the support frame (5) is fixedly provided with a plurality of support bosses (51), and the support bosses (51) are provided with a plurality of mounting holes (52).

4. The power battery sealing injection molded cover plate according to claim 1, characterized in that, An explosion-proof groove (53) is provided in the middle of the support frame (5), and an explosion-proof valve (9) is fixedly installed in the explosion-proof groove (53).

5. A power battery sealing injection molded cover plate according to claim 4, characterized in that, The bottom of the explosion-proof groove (53) is provided with several evenly distributed heat dissipation grooves.

6. A power battery sealing injection molded cover plate according to claim 4, characterized in that, An explosion-proof patch (10) for protecting the explosion-proof valve (9) is attached to the upper end of the substrate (1).

7. A power battery sealing injection molded cover plate according to claim 1, characterized in that, The support frame (5) is fixedly installed with conductive electrode posts (6) that cooperate with negative electrode posts (2) and positive electrode posts (3).

8. A power battery sealing injection molded cover plate according to claim 7, characterized in that, A sealing gasket (7) is fixedly installed between the conductive electrode post (6) and the support frame (5).

9. A power battery sealing injection molded cover plate according to claim 1, characterized in that, The upper end of the support frame (5) is fixedly provided with a plurality of positioning posts (55), and the lower end of the base plate (1) is provided with positioning holes that cooperate with the positioning posts (55).

10. A power battery sealing injection molded cover plate according to claim 1, characterized in that, The substrate (1) is provided with a positioning protrusion (102), the positioning protrusion (102) is provided with a bolt hole (101), and the support frame (5) is provided with a mounting base (54) that cooperates with the positioning protrusion (102).

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